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Mounting and Commissioning
3.1 Mounting and Connections
Figure 3-17
3.1.3.2 Rack and Cubicle Mounting
To install the device in a rack or cubicle, a pair of mounting rails; one for top, one for bottom are required. The
ordering codes are stated in Appendix, Section A.1
• Screw on loosely the two angle brackets in the rack or cabinet, each with four screws.
• Remove the 4 covers at the corners of the front cover. Thus, 4 elongated holes in the mounting bracket are
revealed and can be accessed.
• Fasten the device to the mounting brackets with 4 screws.
• Mount the four covers.
• Tighten fast the eight screws of the angle brackets in the rack or cabinet.
• Screw down a robust low-ohmic protective earth or station earth to the rear of the device using at least an
M4 screw. The cross-sectional area of the earth wire must be equal to the cross-sectional area of any other
conductor connected to the device. The cross-section of the earth wire must be at least 2.5 mm
• Connections use the plug terminals or screw terminals on the rear side of the device in accordance the wiring
diagram.
For screw connections with forked lugs or direct connection, before inserting wires the screws must be tight-
ened so that the screw heads are flush with the outer edge of the connection block.
A ring lug must be centred in the connection chamber so that the screw thread fits in the hole of the lug.
The SIPROTEC 4 System Description has pertinent information regarding wire size, lugs, bending radii, etc.
Installation notes are also given in the brief reference booklet attached to the device.
204
Example of panel flush mounting of a device (housing size
1
/
)
2
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
2
.
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